Shedding mechanism for looms.



r v Patented Sept. l6, I902. G. W. STAFFORD. SHEDDING MECHANISM FOR LOOMS.

(Applicatin filed m1. 2, 1902.)

2 Shank-Shad].

(No Model.)

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THE R'unms PETER! 00,. Pb lOTO-LITHQ. wAsHmcmJN, 04 c,

Patented Sept. l6, I902.

6. w. STAFFUBD S'HEDDING MECHANISM FUR LUOMS..

(Application and Jan. 2, 1902.)

- 2 Shu sts-Sheet 2.

(No Model.)

lflnessesn mi: udnms FEVER! 00.. mom-Lq'nm WASHINGTON, n. c.

f VUNITED STATES PATENT OFFICE;

i PonATIoN QF N EW YORK.

T101 all whom it may concern.-

a citizen of the United States, residing at Bay- 1: side, Warwick, in the cou nty of Kent, State t i 5 'of Rhode Island, have invented a certain new and useful Improvement'in Shedding Mechanisms for Looms, of which the followingis a Specification, reference being had therein to the accompanyingdrawings.

rof. Theinventionrelatestodouble-actingopenshed shedding mechanisms or dobbies for ilooms and it consists in a novel construction.

and combin-ation ofparts producing a shed "ding mechanism or dobby of theclass named n; of simple, inexpensive, and durable character.

H My inventionis illustrated in the accomlphnying drawings, in whichshedding mechanism or dobby embodying my {no invention, only somuch thereof beingrepre ing the sametopractice.

the parts in which the invention more imjqnedi-ately resides. a

1 1 jjAta is represented part of the framing, T which may be of any usual or suitable consame bein fluided in their movements b a a .l

work in horizontal slots to c, Fig. 1, in the op 1 posite sidesof the framing Any preferred means of operating the said lifters may be employed in practice for the purpose of mov- T ing the same oppositely with relation to each other and of causing them to act alternately in moving the hooks and the connections of the latter in lifting the harness-frames. I have represented the said lifters as connect- :ed, respectively, by rods N12 to theopposite arms of a rocker 19 which is mounted on a a5 rock-shaftjbflone such rocker-and pair of connecting-rodsbeing in practice employed at each side of the shedding mechanism or dobby and the rockers being operated for the a purpose of actuating the lifters through power. transmitted from the working parts of Figured shows inside elevation part of a 3'0 structio-n. Twolifters are shown at I) b, the

= =sented as is required for thepurpose of making clear the nature and working of the in 3 3 .vention and the manner and means of reduc- Fig. 2 is a view on 25 the order of a diagram, showing principally any suitable means. Herein they are repre sentedashaving the ends thereof fitted to' tern-chain.

stationary holding-bars 9i i, ashh". hooks cooperate in securing the required actcEo eE .W. STAFFORD, or WARWICK, RHODE ISLAND, ASSIGNOR TO THE GEO. W. STAFFORD COMPANY, or READVILLE, MASSACHUSETTS, A. con- KTSHEDDINGMECHANISM, FOR LOOMS.

SPECIFICATIONfQi'i'hihg part of Letters Patent No. 709,454, dated September 16, 1902.

e Ap'plicationtfiled January 2,1902. Serial No. 88,039. (No model.) l

e e the loom on which the mechanism isen1- Be it known that I, GEORGE W. STAFFORD,

ployed by suitable connections joined to a thirdarm, as 5 with whichthe rocker b is practice is operated in suitable manner by means {not necessary to be shown and described, and at e is represented portion of a pattern-chain applied to the said pattern-cylinder and provided wilh indicators constico tuted by pegs or pins e c. Pattern-fingers n n of usual character are shown, the same being'pivoted at 0 and being arranged to be acted upon by the saidindicators of the pat- In carrying my inventioninto efifect I provide a pair of hooks, as g g, which cooperate, respectively, with the upper andlowerlifters Z) b, respectively. In connection with said hooks g 9 1 provide also a pair of holding'or 7c locking hooks which engage with a pair of All four tion of a harness-frame, the respective hooks g g" serving to connect the saidharness-frame 7 5 with the respective lifters when a movement of the harness-frame is required to take place and the respective holding-hooks serving to retain the harness-frame elevated for two or therewith. The manner and means of uniting the four hooks with one another into a group and connecting such group with the corresponding harness -framemay vary in practice. Preferably I employ a movable part to which all of the respective books constituting the group are joined and which itself isjoined in suitablemanner and by approved connections to the said harnessframe. The said movable part may for the purposes of the present case be termed a 5 transmitter, and preferably the said transmitter is constituted by a slide it, having the four hooks pivoted at 9 71/ g? k respectively,

to its outer end, which is extended vertically to an extent suificient to enable the said hooks IOO to be pivoted thereto one above another in the order that is illustrated. [The inner end of the said slide 70 is hooked, as at. 7;, or otherwise adapted for the attachment of the harness connection. (Not shown.)

K In conjunction with each hook g or g andits companion hook hor h I employ pattern devices serving to control the engagement of the respective hooks g g with the respective lifters b b and of the respective holding-hooks h h with the respective holding-bars '1; t and also the disenga'gement of the respective hooks from the respective lifters and holdingbars. The most satisfactory arrangement for s the purposes comprise needles m' m and pattern-fingers n n, the said pattern-fingers besaid chain;

ing pivotally mounted at 0; The needles m m, respectively, are engaged by the inwardlyprojecting ends of the pattern-fingers, while the weighted outer portions of said patternfingers overhangthe pattern-chain and are acted against bythepegs or pins e of the Needle m has rests or'projecti'ons at m m toengage with the under surfaces of the upper hook g and its companion holding-hook h, and needle m has corresponding" rests or, projections at m m to engage with the under surfaces of the lower hook g and its companion holding-hook h"; Pattern finger n and needle mcontrol the engagement of upper hook g and upper holding-hook h,

respectively, with upper lifter b and upper holdingbar 43, respectively. Patternfinger n and needle m control the engagement of' lower hook g and lower holding-hook h, re-v spectively, with lower lifter b and lower holding-bar 1 respectively.

When either needle is dropped, the. hooks controlled thereby will be dropped also, and the shedding-hook g or .g, as the case may be, willbe engaged by the corresponding lifter in the outgoing movement of the said latter, thereby causing the slide 7a to be drawn outward and the harness-frame raised. The drawings show needle m lowered, the upper hook g engaged with the upper lifter b, and

, the-parts positioned as at the outer extreme of the outgoing movement of thesaid upper.

lifter, with the upper locking-hook hdropped and engaged with the upper holding-bar i. Needle mis shown raised, whereby the lower holding-hook h is raised above the lower'holding-bar t". So long as pegs or pins 6 on the v pattern-chain are presented beneath the pat- I parts which are connected therewith outward slightly far enough to ease up the hold of the holding-hook h against the holding-hart. If in consequence of a shift or advance of the underneath as cams h 72 pattern-chain a portion of the latter having no peg or pin e should be presentbeneath pattern-finger n, at the time when the holdinghook is thus eased, the said pattern-finger will be permitted to turn so as to raise needle m, and thereby lift holding-hook 72, out of engagement with the holding-bar 2'. Thereupon thehook g and connected parts will be free to accompany lifter bin its ingoing movement and will do soin consequence of the pull of the spring that is connected with the harness-frame. In order that needle m may rise, as aforesaid, so asto raise the holding hook h out engagement with holding bar 11,

notwithstanding the fact that hook g is still engaged with lifter b,the hook g is constructed and arranged so that when in'its outward position represented in the drawings there is sufficient clearance vertically between the same and the rest or shoulder m ofsaid needle 7 I to perlnitindependent movement of the needle and the holding-hook h suificientin extent to raise hook it out of engagement with holdingbar t'. This clearance may be provided for in more than one way; but in the present instance I have upwardly bent or curved the vention has been to reduce the length of the shedding mechanism so that the extent of the projection thereof laterally of the loom shall be slight. have'brought the holding-bars i 2" close to the needles m m. The distance traversed by the slide 70 and group'of hooks carries the shoulders of the holding-hooks h h past-said needles inthe inward movement ofsaid hooks. It is necessary, therefore, to prevent the said shoulders from engaging with the rests or projections'at m m on the respective needles m m. To this end the portions of the holding-hooks h h which project outwardly be yond the said shoulders thereof are formed During the inward movement of the hooks these cams encounter the tops of the holding-bars 'i i, and

as they ride overthe same the action raises the holding-hooks sufiiciently to cause the shoulders thereof to clear the rests or projeotions'm m of the needles. In the outward movement of the hooks, the holdinghooks descend as soon as their shoulders have passed outward beyond the said rests or shoulders. I

I claim as myinvention- 1. Ina double-acting shedding mechanism for looms, in combination, the lifters acting alternately, the holding-bars, two pairs of hooks, each pair respectively comprising a hook to engage with the corresponding lifter, and a holding-hook to engage with the corresponding holding-bar,.means for transmit- In securing compactness I ting to a harness-framethe movements which are communicated by the lifters to the hooks, and pattern devices whereby the engagement ofthe hooks with the lifters and holding-bar is controlled, substantially .as described.

2. Ina double-acting shedding mechanism for looms, in combination,the lifters acting alternately, the holding-bars, two pairs of hooks, eachpair respectively comprising a hook to engage with the'corresponding lifter,

andfa holding-hook to engage with the corresponding holding-bar, means fortransmitting,

toa harness-frame the movements which are communicated by the lifters to the hooks, and pattern devices having a member which engages with the hooks ofone pair tocontrol the engagement of snch hooks with the ..cor-

responding litter and holding-bar, and. a second member whichengages with the hooks of the other pairfor the like purpose, substantially as described.

3. In a doable-acting shedding mechanismto aharness-frame the movements which are,

communicated by the lifters to the hooks,and pattern devices having a needle which controls the engagement of the respective hooks "of one pair with the corresponding lifterand holding-bar, and a second needle which controls the engagement of the respective hooks of the other. pair with the corresponding lifter and holding-bar, substantially as described.

4. In a double-acting shedding-mechanism for looms, in combination, the lifters acting alternately, the holding-bars, the transmitter,

the two pairs of hooks connected therewith, each pairthereof comprising a hook to engage with the corresponding lifter and a holdinghook to engage with the corresponding holding-bar, and the pattern devices comprising essentially a pattern-surface, pattern-h ngers, and needles operated by said pattern-fingers and cooperating, respectively with the re- I .spective pairs of hooks, substantially as described.

5. In a donble-acting shedding mechanism for looms, in combination, the lifters acting alternately,'the holding-bars, two pairs of hooks, each pair, respectively, comprising a hook to engage with the corresponding lifter,

and a holding-hook providedwith a cam to cause vertical movement of the hook as it moves across the corresponding holding-bar,

to thereby'clear the needle during the inward movement of the holding-hook, means for' transmitting to a harness-frame the move- .mentswhich are communicated by the lifters to the hooks, and pattern devices having a needle which controls the engagement ofthe respective hooks of one pair with. the corresponding lifter and holding-bar, and a second needle which controls the engagement of the respective hooks of the other pair with the correspondinglifterandholding-bangsubstam tially as described.

Intestimony whereof I aff x my signature GEORGE W. STAFFORD. Witnesses:

CHAS. F. RANDALL, \VILLIAM A. COPELAND.

in presence of two witnesses. 

